The Zohar, Chapter “Ki Tissa (When You Take),” Item 81: …for a thing that requires disclosure, to be revealed later, needs a place for hiding and covering, first. First, it must be concealed from the eye, and then the craftsman lets his craft be shown. Thus, what needs covering later needs to be revealed first. This is so because “God has made them one opposite the other.” All that exists in the degrees of holiness has its opposite in the Sitra Achra (impurity).
Everything will be disclosed through its opposite; the advantage of the Light is revealed from within darkness. The Creator cannot disclose Himself to the creature until the creature reveals His opposite form and learns through that opposite form about what the direct form is.
We can perceive only darkness. We read black letters on a white background, meaning that we feel what is missing. What we reveal is not the Creator, but His absence. We are unable to reveal His properties. Our entire work amounts to revealing Him from His opposite side, as it was said to Moses: “You shall see My back, but My face shall not be seen.”
That is why a person who truly wants to attain the revelation has to go by faith above reason and acquire the power of bestowal, Bina. However, he is unable to reveal this force of bestowal, since he does not feel it. He can reveal it only under the condition that he feels a lack within him, within his darkness, his egoistic desire. This lack is a need for bestowal. We have to reveal it from the opposition, because we always come from the side of the darkness, from the side of egoism and see the opposite of everything. Upon revealing the spiritual world, we will say: “I saw a reverse world.” We don’t even realize how opposite to us spirituality is.